Axion Quality Problem: Keep Calm and Baryon

2025/10/08 by Agrawal, Prateek, Hook, Anson, Loladze, Vazha +1 · 1 citation
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.2510.07366

Abstract

Axion models generically suffer from a severe quality problem when coupled to gravity. In this article we provide a very simple model with a high quality axion. The axion is a pseudo-Nambu-Goldstone boson of the baryon number symmetry, U(1)_B, of a new composite sector that breaks U(1)_B spontaneously when it confines. A controlled example is a supersymmetric QCD (SQCD) with N_c = N_f. The axion shift symmetry is automatically protected due to the high dimension of the gauge-invariant baryon operator, with the Peccei-Quinn breaking operators arising at dimension N_c+2. The standard model gauge group is embedded as a subgroup of the flavor symmetry group of SQCD that has an anomaly with U(1)_B, generating the standard coupling with gluons.

Citations

• Axion-photon conversion in transient compact stars: Systematics, constraints, and opportunities
• A High-Quality Axion from Exact SUSY Chiral Dynamics
• A High-Quality Composite Pati-Salam Axion
• High Quality QCD Axion via Electric-Magnetic Duality
• A Universal Bound on QCD Axions from Supernovae
• Electric dipole moments and the search for new physics
• New experimental approaches in the search for axion-like particles
• Experimental Searches for the Axion and Axion-Like Particles
• The storage ring proton EDM experiment

Cited by

• An Extra-Dimensional Axion in a 5D Warped Orbifold GUT

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